Adafruit QT Py RP2040

The Adafruit QT Py RP2040 is a tiny development board based on the Raspberry Pi RP2040 microcontroller.

Interfaces

Pin	Hardware pin	Alternative names	PWM
`SDA`	`GPIO24`	`I2C0_SDA_PIN`, `SDA_PIN`, `SPI1_SDI_PIN`	`PWM4` (channel A)
`SCL`	`GPIO25`	`I2C0_SCL_PIN`, `SCL_PIN`, `SPI1_CS`	`PWM4` (channel B)
`TX`	`GPIO20`	`UART1_TX_PIN`	`PWM2` (channel A)
`MO`	`GPIO3`	`MOSI`, `SPI0_SDO_PIN`	`PWM1` (channel B)
`MI`	`GPIO4`	`MISO`, `SPI0_SDI_PIN`	`PWM2` (channel A)
`SCK`	`GPIO6`	`SPI0_SCK_PIN`	`PWM3` (channel A)
`RX`	`GPIO5`	`SPI0_CS`, `UART1_RX_PIN`	`PWM2` (channel B)
`QT_SCL1`	`GPIO23`	`I2C1_QT_SCL_PIN`	`PWM3` (channel B)
`QT_SDA1`	`GPIO22`	`I2C1_QT_SDA_PIN`	`PWM3` (channel A)
`A0`	`GPIO29`	`UART0_RX_PIN`, `UART_RX_PIN`, `ADC3`	`PWM6` (channel B)
`A1`	`GPIO28`	`UART0_TX_PIN`, `UART_TX_PIN`, `ADC2`	`PWM6` (channel A)
`A2`	`GPIO27`	`I2C1_SCL_PIN`, `SPI1_SDO_PIN`, `ADC1`	`PWM5` (channel B)
`A3`	`GPIO26`	`I2C1_SDA_PIN`, `SPI1_SCK_PIN`, `ADC0`	`PWM5` (channel A)
`NEOPIXEL`	`GPIO12`	`WS2812`	`PWM6` (channel A)
`NEOPIXEL_POWER`	`GPIO11`		`PWM5` (channel B)

The QT Py RP2040 comes with the UF2 bootloader already installed.

Flash your TinyGo program to the board using this command:

tinygo flash -target=qtpy-rp2040 [PATH TO YOUR PROGRAM]

Any troubleshooting tips go here.

To use the Qwiic/StemmaQT port on this board with I2C drivers you’ll need to configure the I2C1 device:

i2c := machine.I2C1
i2c.Configure(machine.I2CConfig{
	SCL: machine.I2C1_QT_SCL_PIN,
	SDA: machine.I2C1_QT_SDA_PIN,
})

You can use the USB port to the QT Py RP2040 as a serial port.

TinyGo has support for the RP2040’s on-board Programmable Input/Output (PIO) block.